The correct answer to this question is: It limited the number of goods individuals could purchase.
Explanation: War rationing was a system where need was analyzed and people were given priorities and access to a particular segment of the resources in proportion to their need. The highest priority was given to the war effort.
Do you mean what? I would say disease, the natives have never came in contact with those sicknesses so they died out fast because of how weak their immune systems were.